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<?php

if ( ! defined( 'ABSPATH' ) ) {
	die( 'You are not allowed to call this page directly.' );
}

class FrmProDisplaysHelper {

public static function get_shortcodes( $content, $form_id ) {
		if ( ! $form_id || strpos( $content, '[' ) === false ) {
			// don't continue if there are no shortcodes to check
			return array( array() );
		}

$tagregexp   = array( 'deletelink', 'detaillink', 'evenodd', 'get', 'entry_count', 'event_date', 'is[-|_]draft' );
		$form_id     = (int) $form_id;
		$form_ids    = self::linked_form_ids( $form_id );
		$field_query = array(
			'form_id' => $form_ids,
			'or'      => 1,
		);
		$field_keys  = FrmDb::get_col( 'frm_fields', $field_query, 'field_key' );

if ( count( $field_keys ) > 200 ) {
			$tagregexp = array_merge( $tagregexp, self::get_additional_keys_for_regex( $content, $field_keys ) );
		} else {
			$tagregexp = array_merge( $tagregexp, $field_keys );
		}

$tagregexp  = implode( '|', $tagregexp ) . '|';
		$tagregexp .= FrmFieldsHelper::allowed_shortcodes();

self::maybe_increase_regex_limit();

preg_match_all( "/\[(if |foreach )?(\d+|$tagregexp)\b(.*?)(?:(\/))?\](?:(.+?)\[\/\2\])?/s", $content, $matches, PREG_PATTERN_ORDER );

$matches[0] = self::organize_and_filter_shortcodes( $matches[0] );

return $matches;
	}

/**
	 * To avoid issues with regex limits, remove any field keys that aren't found in the content ahead of time for large field sets.
	 *
	 * @param string $content
	 * @param array  $keys
	 * @return array
	 */
	private static function get_additional_keys_for_regex( $content, $keys ) {
		$additional_keys = array();
		foreach ( $keys as $key ) {
			if ( false !== strpos( $content, $key ) ) {
				$additional_keys[] = $key;
			}
		}
		return $additional_keys;
	}

/**
	 * Get the ids of any child forms (repeat or embedded)
	 *
	 * @since 3.0
	 */
	private static function linked_form_ids( $form_id ) {
		$linked_field_query = array(
			'form_id' => $form_id,
			'type'    => array( 'divider', 'form' ),
		);
		$fields             = FrmDb::get_col( 'frm_fields', $linked_field_query, 'field_options' );

$form_ids = array( $form_id );
		foreach ( $fields as $field_options ) {
			FrmProAppHelper::unserialize_or_decode( $field_options );
			if ( ! empty( $field_options['form_select'] ) ) {
				$form_ids[] = $field_options['form_select'];
			}
			unset( $field_options );
		}

return $form_ids;
	}

/**
	 * Make sure the backtrack limit is as least at the default
	 *
	 * @since 3.0
	 */
	private static function maybe_increase_regex_limit() {
		$backtrack_limit = ini_get( 'pcre.backtrack_limit' );
		if ( $backtrack_limit < 1000000 ) {
			ini_set( 'pcre.backtrack_limit', 1000000 );
		}
	}

/**
	 * Put conditionals and foreach first
	 * Remove duplicate conditional and foreach tags
	 *
	 * @since 2.01.03
	 * @param array $shortcodes
	 * @return array $shortcodes
	 */
	private static function organize_and_filter_shortcodes( $shortcodes ) {
		$move_up = array();

foreach ( $shortcodes as $short_key => $tag ) {
			$conditional = preg_match( '/^\[if/s', $shortcodes[ $short_key ] ) ? true : false;
			$foreach     = preg_match( '/^\[foreach/s', $shortcodes[ $short_key ] ) ? true : false;

if ( $conditional || $foreach ) {
				if ( ! in_array( $tag, $move_up, true ) ) {
					$move_up[ $short_key ] = $tag;
				}
				unset( $shortcodes[ $short_key ] );
			}
		}

if ( $move_up ) {
			$shortcodes = $move_up + $shortcodes;
		}

return $shortcodes;
	}

public static function prepare_duplicate_view( &$post ) {
		if ( is_callable( 'FrmViewsDisplaysHelper::prepare_duplicate_view' ) ) {
			FrmViewsDisplaysHelper::prepare_duplicate_view( $post );
		}
	}

public static function get_show_counts() {
		if ( is_callable( 'FrmViewsDisplaysHelper::get_show_counts' ) ) {
			return FrmViewsDisplaysHelper::get_show_counts();
		}
		return array();
	}

/**
	 * @param string|false $include_key if false all keys are included.
	 * @return array
	 */
	public static function get_frm_options_for_views( $include_key = false ) {
		if ( is_callable( 'FrmViewsDisplaysHelper::get_frm_options_for_views' ) ) {
			return FrmViewsDisplaysHelper::get_frm_options_for_views( $include_key );
		}
		return array();
	}

/**
	 * @deprecated 4.09
	 */
	public static function where_is_options() {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::where_is_options' );
	}

/**
	 * @deprecated 4.09
	 */
	public static function get_meta_values( $key = '', $post_type = 'frm_display' ) {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::get_meta_values', $key, $post_type );
	}

/**
	 * @deprecated 4.09
	 */
	public static function get_default_opts() {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::get_default_opts' );
	}

/**
	 * @deprecated 4.09
	 */
	public static function get_current_view( $post ) {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::get_current_view', $post );
	}

/**
	 * @deprecated 4.09
	 */
	public static function setup_new_vars() {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::setup_new_vars' );
	}

/**
	 * @deprecated 4.09
	 */
	public static function setup_edit_vars( $post, $check_post = true ) {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::setup_edit_vars', $post, $check_post );
	}

/**
	 * @deprecated 4.09
	 */
	public static function is_edit_view_page() {
		return self::deprecated_function( __METHOD__, 'FrmViewsDisplaysHelper::is_edit_view_page' );
	}

/**
	 * Call FrmProDisplaysController::deprecated_function if possible
	 * During the migration process FrmProDisplaysController.php might still be out of date
	 */
	private static function deprecated_function( $method, $replacement = '', ...$params ) {
		if ( is_callable( 'FrmProDisplaysController::deprecated_function' ) ) {
			return FrmProDisplaysController::deprecated_function( $method, $replacement, ...$params );
		}

_deprecated_function( $method, '4.09', $replacement );

if ( $replacement && is_callable( $replacement ) ) {
			return $replacement( ...$params );
		}
	}
}